code: def test_onset_strength_noinput():
      librosa.onset.onset_strength(y=None, S=None)
  
imports: import pytest
  from contextlib import nullcontext
  import os
  import warnings
  import numpy
  import librosa
  from test_core import srand
label_desc: Use image node_id 5 for calling a global function with example usage: test_onset_strength_noinput() without return types